Measurement of the two-photon exchange contribution in elastic ep scattering at VEPP-3

被引：16

作者：

Gramolin, A. V. ^{[1
]}

Arrington, J. ^{[2
]}

Barkov, L. M. ^{[1
]}

Dmitriev, V. F. ^{[1
,3
]}

Gauzshtein, V. V. ^{[4
]}

Golovin, R. A. ^{[1
]}

Holt, R. J. ^{[2
]}

Kaminsky, V. V. ^{[1
]}

Lazarenko, B. A. ^{[1
]}

Mishnev, S. I. ^{[1
]}

Muchnoi, N. Yu. ^{[1
,3
]}

Neufeld, V. V. ^{[1
]}

Nikolenko, D. M. ^{[1
]}

Rachek, I. A. ^{[1
]}

Sadykov, R. Sh. ^{[1
]}

Shestakov, Yu. V. ^{[1
,3
]}

Stibunov, V. N. ^{[4
]}

Toporkov, D. K. ^{[1
,3
]}

de Vries, H. ^{[5
]}

Zevakov, S. A. ^{[1
]}

Zhilich, V. N. ^{[1
]}

机构：

[1] SB RAS, Budker Inst Nucl Phys, Novosibirsk, Russia

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Novosibirsk State Univ, Novosibirsk 630090, Russia

[4] Tomsk Polytech Univ, Inst Nucl Phys, Tomsk, Russia

[5] NIKHEF, Amsterdam, Netherlands

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2012年 / 225卷

基金：

美国国家科学基金会; 俄罗斯基础研究基金会;

关键词：

elastic electron-proton scattering; two-photon exchange; electromagnetic form factors of the proton; POLARIZATION TRANSFER; FORM-FACTORS; POSITRONS; ELECTRONS; PROTON; NUCLEON;

D O I：

10.1016/j.nuclphysbps.2012.02.045

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We report on the status of the Novosibirsk experiment on a precision measurement of the ratio R of the elastic e(+)p and e(-)p scattering cross sections. Such measurements determine the two-photon exchange effect in elastic electron-proton scattering. The experiment is conducted at the VEPP-3 storage ring using a hydrogen internal gas target. The ratio R is measured with a beam energy of 1.6 GeV (electron/positron scattering angles are theta = 55 divided by 75 degrees and theta = 15 divided by 25 degrees) and 1 GeV (theta = 65 divided by 105 degrees). We briefly describe the experimental method, paying special attention to the radiative corrections. Some preliminary results are presented.

引用

页码：216 / 220

页数：5

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